Contrasting patterns of microbial dominance in the Arabidopsis thaliana 
phyllosphere

Lundberg, DS; de Pedro Jové, R; Na Ayutthaya, PP; Karasov, TL; Shalev, O; Poersch, K; Ding, W; Bollmann-Giolai, A; Bezrukov, I; Weigel, D

doi:10.1073/pnas.2211881119

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Contrasting patterns of microbial dominance in the Arabidopsis thaliana phyllosphere

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Lundberg, DS
Department Molecular Biology, Max Planck Institute for Biology Tübingen, Max Planck Society;

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de Pedro Jové, R
Department Molecular Biology, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Na Ayutthaya, PP
Department Molecular Biology, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Karasov, TL
Department Molecular Biology, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Shalev, O
Department Molecular Biology, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Poersch, K
Department Molecular Biology, Max Planck Institute for Biology Tübingen, Max Planck Society;

/persons/resource/persons273205

Ding, W
Department Molecular Biology, Max Planck Institute for Biology Tübingen, Max Planck Society;

/persons/resource/persons295893

Bollmann-Giolai, A
Department Molecular Biology, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Bezrukov, I
Department Molecular Biology, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Weigel, D
Department Molecular Biology, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Citation

Lundberg, D., de Pedro Jové, R., Na Ayutthaya, P., Karasov, T., Shalev, O., Poersch, K., et al. (2022). Contrasting patterns of microbial dominance in the Arabidopsis thaliana phyllosphere. Proceedings of the National Academy of Sciences of the United States of America, 119(52): e2211881119. doi:10.1073/pnas.2211881119.

Cite as: https://hdl.handle.net/21.11116/0000-000A-62C6-8

Abstract

Sphingomonas is one of the most abundant bacterial genera in the phyllosphere of wild Arabidopsis thaliana, but relative to Pseudomonas, the ecology of Sphingomonas and its interaction with plants is poorly described. We analyzed the genomic features of over 400 Sphingomonas isolates collected from local A. thaliana populations, which revealed much higher intergenomic diversity than for the considerably more uniform Pseudomonas isolates found in the same host populations. Variation in Sphingomonas plasmid complements and additional genomic features suggest high adaptability of this genus, and the widespread presence of protein secretion systems hints at frequent biotic interactions. While some of the isolates showed plant-protective phenotypes in lab tests, this was a rare trait. To begin to understand the extent of strain sharing across alternate hosts, we employed amplicon sequencing and a bulk-culturing metagenomics approach on both A. thaliana and neighboring plants. Our data reveal that both Sphingomonas and Pseudomonas thrive on other diverse plant hosts, but that Sphingomonas is a poor competitor in dying or dead leaves.